📄 render.java
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ey = y3 .FIX16_TO_INT();
midy = y2 .FIX16_TO_INT();
}
//y1 ,x1不再使用～～被最为临时变量
y1 .Data = x1 .Data;
//裁减
if (ey > this .ScreenHSub1)
ey = this .ScreenHSub1;
/*
for (drawy = sy ; drawy < ey ; drawy ++)
{
//分割三角形
if (drawy == midy)
{
if (y2 .Data > y3 .Data)
{
drawsx = x3.FIX16_TO_INT();
ldx .FLOAT_TO_FIX16 ((poly.Tlist[Index2].Pos.M[0] - poly.Tlist[Index3].Pos.M[0]) /
(poly.Tlist[Index2].Pos.M[1] - poly.Tlist[Index3].Pos.M[1])) ;
}//if
else
{
drawex = x2.FIX16_TO_INT();
rdx .FLOAT_TO_FIX16 ((poly.Tlist[Index3].Pos.M[0] - poly.Tlist[Index2].Pos.M[0]) /
(poly.Tlist[Index3].Pos.M[1] - poly.Tlist[Index2].Pos.M[1])) ;
}//if
}//if
//绘制
this .FillFlatLine(drawy , drawsx , drawex , poly .Color);
x1 .Data += ldx .Data;
y1 .Data += rdx .Data;
drawsx = x1.FIX16_TO_INT();
drawex = y1.FIX16_TO_INT();
}//for
*/
if (sy < 0)
{
drawsx = ((-sy)*ldx.Data)>>16;
drawex = ((-sy)*rdx.Data)>>16;
sy = 0;
}//if
for (drawy = sy ; drawy <= midy ; drawy ++)
{
//绘制
this .FillFlatLine(drawy , drawsx , drawex , poly .Color);
x1 .Data += ldx .Data;
y1 .Data += rdx .Data;
drawsx = x1.Data >> FIX16.FIX16_SHIFT;
drawex = y1.Data >> FIX16.FIX16_SHIFT;
}//for
//三角形分段
if (y2 .Data > y3 .Data)
{
drawsx = x3.Data >> FIX16.FIX16_SHIFT;
ldx .FLOAT_TO_FIX16 ((poly.Tlist[Index2].Pos.M[0] - poly.Tlist[Index3].Pos.M[0]) /
(poly.Tlist[Index2].Pos.M[1] - poly.Tlist[Index3].Pos.M[1])) ;
}//if
else
{
drawex = x2.Data >> FIX16.FIX16_SHIFT;
rdx .FLOAT_TO_FIX16 ((poly.Tlist[Index3].Pos.M[0] - poly.Tlist[Index2].Pos.M[0]) /
(poly.Tlist[Index3].Pos.M[1] - poly.Tlist[Index2].Pos.M[1])) ;
}//if
for ( ; drawy <= ey ; drawy ++)
{
//绘制
this .FillFlatLine(drawy , drawsx , drawex , poly .Color);
x1 .Data += ldx .Data;
y1 .Data += rdx .Data;
drawsx = x1.Data >> FIX16.FIX16_SHIFT;
drawex = y1.Data >> FIX16.FIX16_SHIFT;
}//for
}
/**
* 多边形的插值着色
* @param poly
*/
public void DrawPolyGOURAUD (Poly_4D poly)
{
int temp ;
//顶点索引
int Index1 = poly.VIndex[0] , Index2 = poly.VIndex[1] ,
Index3 = poly.VIndex[2];
//顶点排序
if (poly.Tlist[Index1].Pos.M[1] > poly.Tlist[Index2].Pos.M[1])
{
temp = Index1;
Index1 = Index2;
Index2 = temp;
}
if (poly.Tlist[Index1].Pos.M[1] > poly.Tlist[Index3].Pos.M[1])
{
temp = Index1;
Index1 = Index3;
Index3 = temp;
}
if (poly.Tlist[Index3].Pos.M[0] > poly.Tlist[Index2].Pos.M[0])
{
temp = Index2;
Index2 = Index3;
Index3 = temp;
}
/////////////////////////////////////////////////////
FIX16 x1 = new FIX16 (poly.Tlist[Index1].Pos.M[0]);
FIX16 y1 = new FIX16 (poly.Tlist[Index1].Pos.M[1]);
FIX16 x2 = new FIX16 (poly.Tlist[Index2].Pos.M[0]);
FIX16 y2 = new FIX16 (poly.Tlist[Index2].Pos.M[1]);
FIX16 x3 = new FIX16 (poly.Tlist[Index3].Pos.M[0]);
FIX16 y3 = new FIX16 (poly.Tlist[Index3].Pos.M[1]);
float divldy = 1 / (poly.Tlist[Index3].Pos.M[1] - poly.Tlist[Index1].Pos.M[1]);
float divrdy = 1 / (poly.Tlist[Index2].Pos.M[1] - poly.Tlist[Index1].Pos.M[1]);
FIX16 ldx = new FIX16 ((poly.Tlist[Index3].Pos.M[0] - poly.Tlist[Index1].Pos.M[0]) * divldy);
FIX16 rdx = new FIX16 ((poly.Tlist[Index2].Pos.M[0] - poly.Tlist[Index1].Pos.M[0]) * divrdy);
int drawy , drawsx = x1.FIX16_TO_INT(), drawex = x1 .FIX16_TO_INT();
int sy = y1.FIX16_TO_INT() , ey , midy ;
//色彩插值数据
int c1 =(((poly.Tlist[Index1].r & 255)<< 16)+
((poly.Tlist[Index1].g & 255) << 8)+ (poly.Tlist[Index1].b & 255));
int c2 =(((poly.Tlist[Index2].r & 255)<< 16)+
((poly.Tlist[Index2].g & 255) << 8)+ (poly.Tlist[Index2].b & 255));
int c3 =(((poly.Tlist[Index3].r & 255)<< 16)+
((poly.Tlist[Index3].g & 255) << 8)+ (poly.Tlist[Index3].b & 255));
FIX16 ldc = new FIX16 ();
ldc .Data = (int) (((c2 - c1) << 16) * divldy);
FIX16 rdc = new FIX16 ();
rdc .Data = (int) (((c3 - c1) << 16) * divrdy);
int drawsc = c1, drawec = c1;
FIX16 addlc = new FIX16 ();
addlc .Data = 0 ;
FIX16 addrc = new FIX16 ();
addrc .Data = 0 ;
if (y2 .Data > y3 .Data)
{
ey = y2 .FIX16_TO_INT();
midy = y3 .FIX16_TO_INT();
}
else
{
ey = y3 .FIX16_TO_INT();
midy = y2 .FIX16_TO_INT();
}
//y1 ,x1不再使用～～被最为临时变量
y1 .Data = x1 .Data;
//裁减
if (ey > this .ScreenHSub1)
ey = this .ScreenHSub1;
if (sy < 0)
{
drawsx = ((-sy)*ldx.Data)>>16;
drawex = ((-sy)*rdx.Data)>>16;
sy = 0;
}//if
for (drawy = sy ; drawy <= midy ; drawy ++)
{
//绘制
this .FillFlatLineGOURAUD(drawy , drawsx , drawex , drawsc, drawec);
x1 .Data += ldx .Data;
y1 .Data += rdx .Data;
drawsx = x1.FIX16_TO_INT();
drawex = y1.FIX16_TO_INT();
drawsc = c1 + (addlc .Data >> 16);
drawec = c1 + (addrc .Data >> 16);
addlc.Data += ldc.Data ;
addrc.Data += rdc.Data ;
}//for
if (y2 .Data > y3 .Data)
{
divldy = 1 / (poly.Tlist[Index2].Pos.M[1] - poly.Tlist[Index3].Pos.M[1]);
drawsx = x3.FIX16_TO_INT();
ldx .FLOAT_TO_FIX16 ((poly.Tlist[Index2].Pos.M[0] - poly.Tlist[Index3].Pos.M[0]) *
divldy );
addlc.Data = 0;
drawsc = c3;
ldc .Data = (int) (((c2 - c3) << 16) * divldy);
}//if
else
{
divrdy = 1 / (poly.Tlist[Index3].Pos.M[1] - poly.Tlist[Index2].Pos.M[1]);
drawex = x2.FIX16_TO_INT();
rdx .FLOAT_TO_FIX16 ((poly.Tlist[Index3].Pos.M[0] - poly.Tlist[Index2].Pos.M[0]) *
divrdy );
addrc.Data = 0;
drawec = c2;
rdc .Data = (int) (((c3 - c2) << 16) * divrdy);
}//if
for (drawy = midy + 1 ; drawy <= midy ; drawy ++)
{
//绘制
this .FillFlatLineGOURAUD(drawy , drawsx , drawex , drawsc, drawec);
x1 .Data += ldx .Data;
y1 .Data += rdx .Data;
drawsx = x1.FIX16_TO_INT();
drawex = y1.FIX16_TO_INT();
drawsc = c1 + (addlc .Data >> 16);
drawec = c1 + (addrc .Data >> 16);
addlc.Data += ldc.Data ;
addrc.Data += rdc.Data ;
}//for
}
/**
* 三角形的渲染～线筐模式
* @param poly
*/
public void DrawPolyByLine (Poly_4D poly)
{
this .DrawLine((int)poly .Tlist[poly.VIndex[0]].Pos.M[0] , (int)poly .Tlist[poly.VIndex[0]].Pos.M[1],
(int)poly .Tlist[poly.VIndex[1]].Pos.M[0], (int)poly .Tlist[poly.VIndex[1]].Pos.M[1],
poly .Color);
this .DrawLine((int)poly .Tlist[poly.VIndex[0]].Pos.M[0] , (int)poly .Tlist[poly.VIndex[0]].Pos.M[1],
(int)poly .Tlist[poly.VIndex[2]].Pos.M[0], (int)poly .Tlist[poly.VIndex[2]].Pos.M[1],
poly .Color);
this .DrawLine((int)poly .Tlist[poly.VIndex[1]].Pos.M[0] , (int)poly .Tlist[poly.VIndex[1]].Pos.M[1],
(int)poly .Tlist[poly.VIndex[2]].Pos.M[0], (int)poly .Tlist[poly.VIndex[2]].Pos.M[1],
poly .Color);
}
/**
* 仿射渲染
* @param poly
*/
public void DrawPolyTextrue (Poly_4D poly)
{
int temp ;
//顶点索引
int Index1 = poly.VIndex[0] , Index2 = poly.VIndex[1] ,
Index3 = poly.VIndex[2];
//顶点排序
if (poly.Tlist[Index1].Pos.M[1] > poly.Tlist[Index2].Pos.M[1])
{
temp = Index1;
Index1 = Index2;
Index2 = temp;
}
if (poly.Tlist[Index1].Pos.M[1] > poly.Tlist[Index3].Pos.M[1])
{
temp = Index1;
Index1 = Index3;
Index3 = temp;
}
if (poly.Tlist[Index3].Pos.M[0] > poly.Tlist[Index2].Pos.M[0])
{
temp = Index2;
Index2 = Index3;
Index3 = temp;
}
FIX16 x1 = new FIX16 (poly.Tlist[Index1].Pos.M[0]);
FIX16 y1 = new FIX16 (poly.Tlist[Index1].Pos.M[1]);
FIX16 x2 = new FIX16 (poly.Tlist[Index2].Pos.M[0]);
FIX16 y2 = new FIX16 (poly.Tlist[Index2].Pos.M[1]);
FIX16 x3 = new FIX16 (poly.Tlist[Index3].Pos.M[0]);
FIX16 y3 = new FIX16 (poly.Tlist[Index3].Pos.M[1]);
FIX16 ldx = new FIX16 ((poly.Tlist[Index3].Pos.M[0] - poly.Tlist[Index1].Pos.M[0]) /
(poly.Tlist[Index3].Pos.M[1] - poly.Tlist[Index1].Pos.M[1]));
FIX16 rdx = new FIX16 ((poly.Tlist[Index2].Pos.M[0] - poly.Tlist[Index1].Pos.M[0]) /
(poly.Tlist[Index2].Pos.M[1] - poly.Tlist[Index1].Pos.M[1]));
int drawy , drawsx = x1.FIX16_TO_INT(), drawex = x1 .FIX16_TO_INT();
int sy = y1.FIX16_TO_INT() , ey , midy ;
if (y2 .Data > y3 .Data)
{
ey = y2 .FIX16_TO_INT();
midy = y3 .FIX16_TO_INT();
}
else
{
ey = y3 .FIX16_TO_INT();
midy = y2 .FIX16_TO_INT();
}
//y1 ,x1不再使用～～被最为临时变量
y1 .Data = x1 .Data;
//裁减
if (ey > this .ScreenHSub1)
ey = this .ScreenHSub1;
if (sy < 0)
{
drawsx = ((-sy)*ldx.Data)>>16;
drawex = ((-sy)*rdx.Data)>>16;
sy = 0;
}//if
for (drawy = sy ; drawy <= midy ; drawy ++)
{
//绘制
this .FillFlatLine(drawy , drawsx , drawex , poly .Color);
x1 .Data += ldx .Data;
y1 .Data += rdx .Data;
drawsx = x1.Data >> FIX16.FIX16_SHIFT;
drawex = y1.Data >> FIX16.FIX16_SHIFT;
}//for
//三角形分段
if (y2 .Data > y3 .Data)
{
drawsx = x3.Data >> FIX16.FIX16_SHIFT;
ldx .FLOAT_TO_FIX16 ((poly.Tlist[Index2].Pos.M[0] - poly.Tlist[Index3].Pos.M[0]) /
(poly.Tlist[Index2].Pos.M[1] - poly.Tlist[Index3].Pos.M[1]));
}//if
else
{
drawex = x2.Data >> FIX16.FIX16_SHIFT;
rdx .FLOAT_TO_FIX16 ((poly.Tlist[Index3].Pos.M[0] - poly.Tlist[Index2].Pos.M[0]) /
(poly.Tlist[Index3].Pos.M[1] - poly.Tlist[Index2].Pos.M[1])) ;
}//if
for (drawy = midy + 1 ; drawy <= ey ; drawy ++)
{
//绘制
this .FillFlatLine(drawy , drawsx , drawex , poly .Color);
x1 .Data += ldx .Data;
y1 .Data += rdx .Data;
drawsx = x1.Data >> FIX16.FIX16_SHIFT;
drawex = y1.Data >> FIX16.FIX16_SHIFT;
}//for
}
/**
* 修正映射渲染
* @param poly
*/
public void DrawPolyTexCorrect (Poly_4D poly)
{
}
/**
* 清除缓存
*
*/
public void CleanRender ()
{
int i ;
for (i = 0 ; i < this.ScreenBuffer.length ; i ++)
{
this .ScreenBuffer [i] = 0;
}//for
}
/**
* 填充指定区域
* @param x
* @param y
* @param w
* @param h
*/
public void FillRect (int x , int y , int w , int h , int Color)
{
if (x > this .ScreenWSub1 || x + w < 0 || y > this .ScreenHSub1 ||
y + h < 0)
return ;
if (x < 0)
{
w += x ;
x = 0 ;
}//if
if (y < 0)
{
h += y ;
y = 0;
}//if
w = w > this .ScreenWSub1 ? (this .ScreenWSub1 - x) : w ;
h = h > this .ScreenHSub1 ? (this .ScreenHSub1 - y) : h ;
int ex = x + w ;
for (int i = 0 ; i <= h ; i ++)
{
//System .out .println("RunHere");
this .FillFlatLine(y , x ,ex, Color);
y ++ ;
}//for
}
}
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